Optically Worked Double Concave Glass Lens, 50mm Diameter Focal Length:100mm measures 2" total length and

measures 2" total length and is 0

this cover-protected single rheostat carries a constantan winding with 4mm safety socket terminals

providing clear visibility of tube contents across stacked rows during experiments and storage

Fifty-turn 4A coil for the demountable transformer

letting students watch the wire travel along the rail as roughly 3A of current crosses the magnetic field

Optically Worked Double Concave Glass Lens, 50mm Diameter Focal Length:100mm measures 2" total length andSpherical optically worked glass lens with ground edges demonstrates how diverging lenses always produce smaller virtual upright images for ray tracing exercises.